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The observation of tt¯h(125) production at the Large Hadron Collider (LHC) is the first direct measurement of the top Yukawa coupling. It opens the window on an extra top Yukawa… Click to show full abstract
The observation of tt¯h(125) production at the Large Hadron Collider (LHC) is the first direct measurement of the top Yukawa coupling. It opens the window on an extra top Yukawa coupling, ρtt, from a second Higgs doublet, without a Z2 symmetry to forbid flavor changing neutral Higgs couplings. We show that tt¯h and Higgs property measurements at the High Luminosity LHC can constrain the Reρtt–Imρtt parameter space that could drive electroweak baryogenesis, but the Γh width measurement must be considerably improved beyond current projections.
Journal Title: Physical Review D
Year Published: 2018
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